A manual of veterinary physiology.

  • Smith, Frederick, 1857-1929.
Date:
1907
Catalogue details

Licence: Public Domain Mark

Credit: A manual of veterinary physiology. Source: Wellcome Collection.

Provider: This material has been provided by the Augustus C. Long Health Sciences Library at Columbia University and Columbia University Libraries/Information Services, through the Medical Heritage Library. The original may be consulted at the the Augustus C. Long Health Sciences Library at Columbia University and Columbia University.

    45/760 (page 23)
    The same observer gives the amount of blood in the body of the horse at QG lbs., or nearly 50 pints. The Distribution of Blood in the Body (Fig. 8) is believed to be as follows : About one-fourth in the heart, lungs, hirge vessels, and veins. ,, ,, liver. ,, ,, skeletal muscles. „ „ other organs. It is probable that in the horse the liver would contain less than one-fourth the bulk of blood, while the skeletal muscles would contain more. Under certain conditions Liver 29-5 Muscles 29-2 GreatVes%ei%Heartklungs 2 27 'Bones , 8-2 Jnu stint siigtnitctl organs 6-3 Skin Zl Kidneys IS /Verve Centres L 2 Sjileen. OZ^ YiG. 8.—Diagram to illustrate the Distribution of the Blood IN THE Various Organs of a Kabbit, after Eanke's Measurements (Stewart). The numbers are percentages of the total blood. the abdominal veins are capable of containing the whole of the blood in the body. When an organ is active it receives more blood than when in a state of rest; this increase has been variously estimated at from 30 to 50 per cent. The Gases of Blood,—The blood gases are obtained by introducing the fluid into a Toricellian vacuum, the in- strument used to obtain it being a mercury pump. In a vacuum the blood froths up and gives off its gases, which are then collected and analysed. The gases are oxygen, carbon dioxide, and nitrogen. The proportion of these found depends upon whether the blood be taken from an artery or a vein ; in the former the oxygen is present in larger amount than in the latter, and the carbon dioxide is less. The nitrogen is in both cases practically the same.